Sunseeker S4 vs V3 ReadyGo: which small-lawn mower fits?
Compare LiDAR-led navigation for shaded, narrow lawns with a simpler Vision AI mower for small, clearly edged gardens.
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Sunseeker S4
U.S. lawns up to 0.25 acre where shade, narrow passages or separated zones make LiDAR plus Vision AI an appealing fit
Sunseeker V3 ReadyGo
Small, straightforward U.S. lawns up to 0.15 acre with visible edges and a clear setup path
The quick answer
Choose the S4 when a lawn up to 0.25 acre has shade, tight passages or separate mowing areas that make 3D LiDAR and multi-map support useful. Choose the V3 ReadyGo for a simpler, clearly edged lawn up to 0.15 acre where its smaller capacity and Vision AI setup are enough. Both carry a manufacturer-listed 42% slope maximum; grass compatibility, route, price and setup should decide the fit.
| Buying detail | S4 | V3 ReadyGo |
|---|---|---|
| Best fit | U.S. lawns up to 0.25 acre where shade, narrow passages or separated zones make LiDAR plus Vision AI an appealing fit | Small, straightforward U.S. lawns up to 0.15 acre with visible edges and a clear setup path |
| Rated area | Up to 0.25 acre / 1,000 m², manufacturer rating | Up to 0.15 acre / 6,400 sq ft, manufacturer rating |
| Slope guidance | Up to 42% (22°), manufacturer claim | Up to 42% (22°), manufacturer claim |
| Navigation | 3D LiDAR + Vision AI | Vision AI |
| Price snapshot | $1,279.99 listed → estimated $1,249.99 if code CURRENT applies | $799.99 listed → estimated $769.99 if code CURRENT applies |
| Check first | The 0.25-acre rating makes it a poor fit for a larger lawn or one that needs substantial capacity headroom. | The 0.15-acre rating makes it a poor fit for larger grass areas or sprawling multi-zone lawns. |
Start with the lawn size and the access route
Sunseeker rates the S4 for up to 0.25 acre and the V3 ReadyGo for up to 0.15 acre. The S4 is the larger option, but it earns that capacity when the layout also needs its specific navigation and map features. The V3 suits a smaller, straightforward lawn where clear edges define the work. Measure the mowable grass and the tightest passage before comparing the headline specifications.
The S4 adds LiDAR and multi-map organization
Sunseeker pairs 3D LiDAR with Vision AI on the S4 and lists support for up to 100 zones across five maps. The product page positions it for shaded spaces and narrow passages; it also lists an 80 cm (31.5 in) minimum passage. We would compare it when trees, buildings or a divided garden are real parts of your setup. These are manufacturer specifications, not independent route testing.
The V3 keeps the simpler lawn brief
The V3 ReadyGo uses Vision AI and is intended for a clear-edged lawn without a buried perimeter loop or RTK station. Sunseeker also lists magnetic strips for open or unclear boundaries. That can be an easier match when the lawn is compact and the edges are easy to identify. Choose the S4 when shade or tight access changes that otherwise-simple brief; choose V3 when the extra area and LiDAR setup would add cost without solving a real problem.
Both need a fit check for grass, slope and upkeep
Sunseeker lists up to 42% (22°) slope for both models. Treat this as a maximum manufacturer claim and check working and boundary slopes against the exact manual. The S4 has additional compatibility limits: Sunseeker says it does not support Zoysia or St. Augustine grass and specifies lawn height under 9 cm. Its rain guidance also says not to mow in rain or fog. Check the full listing and package contents before deciding.
Compare current price and code estimate after choosing the fit
On October 16, 2026, Sunseeker’s U.S. pages listed the S4 at $1,279.99 and the V3 ReadyGo at $799.99. Code CURRENT reports $30 off an order, making $1,249.99 and $769.99 conditional estimates if the code applies to each model and current listed price. The official S4 page also displayed a $1,799.99 comparison price; the code estimate starts from the current $1,279.99 price. Model eligibility, sale stacking and checkout are unverified. Confirm both current prices and the final total before paying.
Sources
We checked the exact regional product listings on October 16, 2026: Sunseeker S4 and Sunseeker V3 ReadyGo. Product information and offer estimates can change; confirm the live listing and final cart total.